A QICAR model for quantifying connection between metal ionic character and biosorption capacity of Pleurotus eryngii

作者：He, Nan; Li, Wan; Xu, Heng^*

来源：Desalination and Water Treatment, 2014, 52(34-36): 6519-6529.

DOI：10.1080/19443994.2013.815586

• Metal ionic character
• Mushroom fruit body
• QICAR
• Biosorption

Quantitative ion character-activity relationship (QICAR) was used for quantifying connection between metal ionic characteristics with maximum biosorption capacity (q(max)). q(max) of Pleurotus eryngii was determined by Langmuir isotherm decreasing in the order of: Pb2+ > Cr3+ > Cu2+ > Zn2+ > Cd2+ > Ni2+ > K+. In batch studies, Minimum Run Res V Design was used to determine the most significant medium factors. It was found that pH, biomass loading, and contact time manifest stronger influence on biosorption of Pb2+ and Cd2+. In the 22 physiochemical characteristics of metal ions, Covalent Index @@@ [GRAPHICS] @@@ was correlated best with q(max) for all metal ions tested (R-2 = 0.69). Classifying metal ions appropriately could improve models and more ionic properties could be significantly correlated with q(max). It turned out that the best fitting parameter for divalent metal ions was @@@ [GRAPHICS] @@@ (R-2 = 0.93) and for transition metal ions was |log K-OH| (R-2 = 0.90). Moreover, two-variable model had greater ability to improve the fitting result (R-2 = 0.99).

• 出版日期2014-10-15
• 单位四川大学